Tank-dome closure



Oct. 6, 1925.

' W. K. AUCHINCLOSS TANK DOME CLOSURE Filed Aug. 16, 192,5

:s Rw md Nm @7m n H m m ,zy W5.

Patented Oct. 6, 1925.

UNITED STATES PATENT OFFICE.

WILIAM K. AUCHINCLOSS, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN CAR ANDFOUNDRY COMPANY, F NEW YORK, N. Y., A CORPORATION OF -NEW JERSEY.

TANK-noun cLos'UnE.

Application led August 16, 1923. Serial No. 657,749.

- To all whom t may concern.'

Be it known that I,.WILL1AM K. AUcHrN- cLoss, residing at New York, inthe county and State of New York, and being a citizen of the UnitedStates, have invented certain new and useful Improvements in a Tank-Dome Closure, of which the following is a full, clear, and exactdescription, such as will enable others skilled in the art to which itappertains to make and to use the same,

reference being had to the accompanying drawin s, which illustrate thepreferred form o the invention, though it is to be understood that theinvention is not limited to the exact details of construction shown anddescribed, as it is obvious that various modications thereof within thescope of the claims will occur to persons skilled in the art.

In said drawings:

Fig. 1 is a central vertical section of a car tank dome provided with aclosure constructed in accordance with this invention;

Fig. 2 is a partial plan view of the dome closure shown in Fig. 1, partsbeing broken away to show otherY arts more clearly; and

Fig. 3 is a` artia vertical section of the closure on a arger scaletaken on the line 3-3 of Fig. 2.

It is an object of this invention to provide an improved closure for cartank domes and it is also an object of this invention to provide aclosure of the type in which the cover securing means is t readed on thedome ring and which may not be opened without breaking the seal byrotating the cover and the cover securing means. It is also an object ofthis invention to provide an improved means for securing heat insulatingmaterial to the cover.

In the drawings the improved closure is shown applied to an insulatedtank 1 having a dome sheet 2 secured thereto in an suit--l able manneras by rivets (not shown To the dome sheet 2 there is secured by rivets(not shown) a dome head 3 provided with the usual manhole opening 4.Surrounding the manhole opening 4 is an angular dome ring 5 having oneange secured to the dome head 3 by the rivets 6 and having an upwardlyprojecting ange 7 which is thicker at its upper end and is outwardlythreaded for a short distance from its upper end. The tank 1, dome sheet2 and dome head 3 are protected by a layer of heat insulating mate- 31in one of the bolts 12 to rial 8 which is covered by an outer sheathing`9.

hreaded on the dome ring 5 is an auxiliary ring or collar 10 having aplurality of equally spaced outwardly projecting slotted lugs 11 inwhich bolts 12 carryin nuts 13 are pivotally mounted by means o? 14. Thecollar-10 is also provided with a plurality of oppositely placed lugs 15havin openings 16 to receive links of a chain 1% which attaches a cover18 to the collar 10.

The cover 18 has a plurality of equally spaced bifurcated lu s 19 whichare positioned to receive the olts 12 secured to the ring 10, and isprovided, adjacent one of the lugs 19, with a projecting ortion 20having an opening to receive a 11n of the chain 17. The cover 18 is alsoprovided with an annular projection 21 which en ages with a packing 22placed in a slot 23 ormed in the upper end of the fiange 7 of the domering 5. Projecting inwardly from the cover 18 is an annular projection24 of slightly less diameter than the opening in the ring 5 and providedwith a plurality of integrally formed rivet projections 25 equallyspaced about its inner surface and a `plurallty of equall spacedoutwardly projecting lugs 26 whic engage in slots 27 formed in the u perend of the iange 7 of the ring 5. To fiile lower end of the annularprojection 24Y a plate 28 is secured by headin the rivets 2 5 and servesto hold in place the eat insulating material 29. To reinforce the coverthere are provided the outwardly projecting reinforcing ribs 30.

The auxiliary ring or collar 10 is threaded on to the dome ring 5 afterthe insulation 8 and sheathing 9 are applied and engages with and servesto hold inI lace the sheathing 9 which surrounds the ring 5. After thecover 18 has been placed in position on the ring 5 with the annularprojection 21 engaging with the packin 22 and the lugs 26 engaging inthe slots 2%, the cover 18 is secured in place b placing the bolts 12 inthe lugs 19 and tig tening the nuts 13. The seal (not shown) is thenplaced through an opening revent loosening of the nuts and remova of thecover. With the cover bolted down, the engagement of the lugs 26 inslots 27 prevents rotation of the cover 18 and the collar 10 whereby thecover might be removed without breaking the pins the seal laced throughthe o ening 31 and v insures t at any opening of t e cover must be madeby breaking the seal and releasing the bolts 12. While the improvedclosure has been shown as applied to an insulated tank, it is to beunderstood that it is not to be limited to use with such tanks but maybe applied equally well to uninsulated tanks.

What is claimed is:

1. A tank dome closure comprising a dome ring secured to the dome head,a collar carried by said ring, a coven secured to said collar and meanson said cover interlocking with said ring beneath a. portion of thecover.

2. A tank dome closure comprising a dome ring secured to the dome head,a collar threaded on said ring, and a cover secured to said collar,portions of the cover and ring having interlocking engagement to locksaid collar in place when the cover is closed, and said interlocking'portions being covered When the cover is closed.

3. A tank dome closure comprising a dome ring secured to the dome head,a collar threaded on said ring, a cover on said collar, means securingsaid cover to said collar, said cover having interlocking engagementwith the inner peripheral portion of the ring when closed and preventingrotation of said cover and collar with respect to said ring.

4. A tank dome closure comprising a dome ring secured to the dome headand having axially' disposed seats in its inner peripheral face, acollar carried by said ring and a cover secured to said collar havingprojections-entering the seats in said ring and preventing rotation ofsaid collar and cover.

5. A tank dome closure comprising a slotf ted dome ring secured to thedome head, a collar threaded on saidring and a cover bolted to saidcollar and having projections entering the slots in said'ring.

6. Atank dome closure comprising a vslotted dome ring lsecured to thedome head, a cover carried by said ring, an annular projection on saidcover extending into said ring and lu s on said annular projectionengaging in t e slots in said ring to prevent rotation of the cover withrespect to the ring when shut. l

7 A tank dome closure comprising a dome ring Secured to the dome head, acollar threaded on said ring, a cover ony said collar, bolts pivotallymounted on said collar for securing said lcover to said collar andinterlocking means on said ring and cover preventing rotation of saidcover and collar with respect to said ring.

In Witness whereof I have hereunto set my hand.

WILLIAM K. AUCI-IINCLOSS.

